Removable wrist-pin bearing



R. F. FORKNER AND A. STRAIGHTIFF. REMOVABLE wmsr PIN BEARING.

APPLlCATlON FILE'D JULY 23. 1920.

1,375,142.. Patented Apr. 19, 1921.

' and ALEXANDER Srnsrsrrrrrr, United bearing construction associated snares a sarenr series.

VIRGINIA, AND ALEXANDER nonnn'r r. FORKNER, or PRINCETON, wns'r STRAIGHTIFF, or BOANOKE, VIRGINIA. nniaovannn wnrsr-rrn BEARING. 3,3? 42 Specification of Letters Patent. P m t 19, 1921 Applicationfiled July 23, 1920. Serial No. 398,451.

To oZZwhomit may concern:

Be it known thatwe, Ronni-:1 F. FORKNER citizens of the States, respectively residing at Princeton and Roanoke, in thecounties oi: Mercer and Roanoke, States of West Virginia and Virginia, have invented a new and useful Removable 'WristPin Bearing, of which the following is a specification.

This invention relates to internal combustion engines, and more particularly to the with the a wrist pins employed for connecting the connecting rods to the pistons.

The primary object of the invention is to provide a bearing of this character to permit the wrist pin to float and atthe same time provide a bearing which may be readily and easily replaced, in the event that the same becomes worn beyond use.

A further object of the invention is to provide a thrust bearing associate with each end of the wrist pin, for restricting the lateral thrust thereof.

With the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter escribed and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, may be made within the scope of what is claimed, without departing from the spirit of the invention.

Referring to the drawing the figure illustrates a longitudinal sectional view through a cylinder disclosing a piston there in, the piston being broken away to illustrate the wrist pin.

Referring to the drawing in detail, the reference character 5 designates the cylinder of an internal combustion engine, and which is of the usual construction, the piston indicated by the reference character 6 being shown as positioned within the cylinder to operate therein.

The piston 6 is provided with the usual bearing supports, indicatedvat 7 and in which are supported the tubular bearings indicated at 8 in which bearings is mounted the wrist pin 9 that connects the connecting rod '1( ith the piston 6.

The walls of the bearing supporting the bearings members 7 are threaded to accommodate the threaded portlon of the securing screws 11,

which screws also cooperate with threaded portions of the bearings 8, for securing the bear ngs within the supporting members.

DLSPOSBCl adjacent to the ends of the wrist pin 9, are the thrust bearingslQ which are of diameters less than the interior diameters of the bearings 8 to permit the saime to be read ly and easily positioned within the bearings-.8, the thrustbearings being provided however to restrict lateral movement of the wrist pin 10 with relation to the connecting rod associated therewith.

A securing screw indicated at 13 coop crates with each of the thrust bearings 12 for securing the thrust bearings against displacement, the thrust bearings being shown spaced from/the ends oi? the wrist pin to allow of movement of the wrist pin laterally within its bearings, to provide for the float ing of the wrist pin. Positioned in the outer ends of the bearmg supporting members 7, are the plugs 14L- which abut the thrust bearings 12 to secure 12 against lateral movement in one direction, the securing screws 13 contacting with the plugs 14 to prevent displacement thereof.

From the foregoing it is obvious that due to the construction as described, the bearing may be readily and easily removed and re placed, and the wristpin 9 will be permitted to move laterally within its bearings, to change the wear surface of the wrist pin,to increase the life of the wrist pin and the bearings.

Having thus described the invention, what is claimed as new is 1. In combination ing supporting members forming a part of the piston, tubular bearing members disposed within the bearing supporting members, a wrist pin positione the bearings,

1n thrust bearings disposed adjacent to the 'outer ends of the tubular bearings, and

with a piston and the, connecting rod associated therewith, bear- I d withbearing fitted in one end of eazch oi the tubular bearings, a Wrist pin disbsed in ihe bearings, threaded means exten ing through the piston an cc6pemting with. the bearing as our own, We have hereto mfixed our ROBERT F. FORKfiER.

A F'- 1 w 5 ings for securing "the bearings against ALEAANDER STRAIGHTIFF' movement, and said Wrist pin having i's fitnesses: ends spaced from the thrust bearings. G. E. Alums,

' In testimony that We claim the forego D. N. Amms.

signatures in the presence ofi two Witnesses. 10 

